Which is present in photo chemical smog?
Among the pollutants involved in photochemical smogs are ozone, nitrogen dioxide and peroxyacyl nitrate (PAN). The nitrogen dioxide, and other oxides of nitrogen, are primary pollutants produced by dissociation in combustion reactions, and both ‘prompt’ and ‘thermal’ NOx can be involved in the reactions.
What is photo chemical smog and where is it usually found?
Photochemical smog is a type of smog produced when ultraviolet light from the sun reacts with nitrogen oxides in the atmosphere. It is visible as a brown haze, and is most prominent during the morning and afternoon, especially in densely populated, warm cities.
Is the major photo chemical smog?
The most commonly known photochemical oxidants are ozone, hydrogen peroxides and peroxyacetyl nitrate (PAN). These are formed under the influence of sunlight by complex photochemical reactions. The concentrations of the photochemical oxidants depend on the primary pollutants and the sunlight.
How do you control a photo chemical smog?
Everyone can do their part to reduce smog by changing a few behaviors, such as:
- Drive less.
- Take care of cars.
- Fuel up during the cooler hours of the day—night or early morning.
- Avoid products that release high levels of VOCs.
- Avoid gas-powered yard equipment, like lawn mowers.
What are smog types?
At least two distinct types of smog are recognized: sulfurous smog and photochemical smog. Sulfurous smog, which is also called “London smog,” results from a high concentration of sulfur oxides in the air and is caused by the use of sulfur-bearing fossil fuels, particularly coal.
Why is it called Los Angeles smog?
The term is derived from the words smoke and fog, but it is commonly used to describe the pall of automotive or industrial origin that lies over many cities. Photochemical smog, which is also known as “Los Angeles smog,” occurs most prominently in urban areas that have large numbers of automobiles.
Why is smog in LA so bad?
Cities like LA make it worse because they’re semi-basin, which traps the ozone and keeps it there. The culprit is a complex mix of things. It is estimated that nearly 40% of our country’s imports come through the LA area, transported, of course, by fossil fueled vehicles that put particles in the air.